immigration policy sends those highly skilled immigrants, many of them, educated in the best american colleges and universities back home to their country of origin so they can create jobs there, competing with the u.s. in the global economy. it's called the reverse brain drain. joining me is the director of research at duke university. he's also the author of "the immigrant exodus, why america is losing the global race to capture entrepreneur talent." your research found that from 1995 to 2005, immigrants founded more than a quarter of all tech and engineering start-ups in the united states and more than 52% of those in silicon valley. you have just updated the numbers, and immigrant entrepreneurship has declined. talk to me about this. why is it happening and how do we fix it? >> it's very simple. there are a million skilled immigrants here waiting for permanent residents visas. many of them want to start companies and employ americans and do good for this country. we won't let them, wevisas. so they're getting frustrated and going home. so now we're now boosting our competition. >>